Messages in this thread | | | Date | Thu, 5 Mar 2020 16:45:20 +0100 | From | Christoph Hellwig <> | Subject | Re: [rfc 6/6] dma-remap: double the default DMA coherent pool size |
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On Sun, Mar 01, 2020 at 04:05:27PM -0800, David Rientjes wrote: > When AMD memory encryption is enabled, some devices may used more than > 256KB/sec from the atomic pools. Double the default size to make the > original size and expansion more appropriate. > > This provides a slight optimization on initial expansion and is deemed > appropriate for all configs with CONFIG_DMA_REMAP enabled because of the > increased reliance on the atomic pools. > > Alternatively, this could be done only when CONFIG_AMD_MEM_ENCRYPT is > enabled.
Can we just scale the initial size based on the system memory size?
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